I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
scams scums squamose squamous skims sigmas skimos
cams scams wakames degames gaums camos cwms gamas gambs camas games cames gams acmes agamas jicamas guaiacums guaiocums ogams kames locums scums degamis chacmas